All data are in degrees Celsius. Switch to Fahrenheit
Portstewart, United Kingdom
Portstewart, United Kingdom | © Sergejus Lamanosovas

The most detailed information about the water temperature in Portstewart in Irish Sea (Northen Ireland, United Kingdom). Forecast of changes in water temperature for the next 10 days. Statistics by months for recent years. Information about the neighboring resorts. Weather forecast in Portstewart for a week.

Water temperature in Portstewart right now

data updated 19 minutes ago

47°F

yesterday: 47°F

a week ago: 46°F

Trend: stability

Today water temperature in Portstewart is 47.7°F. In general, this water temperature is unacceptable for swimming. But hardened people can afford to be in such water for 5-10 minutes. In any case, the general weather is also important. So, the air temperature at the same time will reach 39°F.

Analysis and forecast

The water temperature today roughly corresponds to the average value on this day in recent years. Its value has rise over the last week, but has drop compared to 20 days ago. Exactly a year ago, on this day, the water temperature in this location was 46°F. Water temperature range in Portstewart in March is from 42 to 50 degrees.

According to our forecast, in the next 5-6 days the water temperature in Portstewart will become lower than today, but in 10 days it will still slightly rise, its value will be 47°F.

Table of water temperature values in Portstewart

DayFact*Average**Forecast***
Mar 217.8°C8.3°C
Mar 228.0°C7.5°C
Mar 238.4°C7.5°C
Mar 248.3°C8.0°C
Mar 258.4°C7.5°C
Mar 268.7°C8.5°C
Mar 278.6°C7.8°C
Mar 288.7°C8.0°C
Mar 298.5°C9.2°C
Mar 308.3°C9.0°C
Mar 317.8°C8.5°C
Apr 18.0°C8.7°C
Apr 28.0°C8.7°C
Apr 37.8°C8.5°C
Apr 48.5°C9.2°C
* Fact - Actual value of water temperature
** Average - Average water temperature on this day in past years
*** Forecast - Our forecast for the water temperature

Actual nearshore temperatures may vary by several degrees from the indicated values. This is noticeable after heavy rain or after prolonged periods of strong winds. Some downstream winds cause cold, deep waters to replace surface waters that have been warmed by the sun.

To develop a forecast, we use our own mathematical model, which takes into account the current change in water temperature, historical data and the main weather trends, wind strength and direction, air temperature in each specific region. We also take into account data for other resorts in United Kingdom.

Kilkeel, United Kingdom
Kilkeel, United Kingdom | © Jim Leonard

Annual graph of average water temperature change in Portstewart

Water temperature in Portstewart by month

Portstewart located in the northern hemisphere, at latitude 55 degrees. The water in this location never warms up to comfortable values. Average annual water temperature on the coast in Portstewart is 51°F, by the seasons: in winter 48°F, in spring 47°F, in summer 56°F, in autumn 55°F. Minimum water temperature (44°F) in Portstewart it happens in March, maximum (59°F) in August.

You can find out detailed data on how the water temperature in Portstewart changes in each specific month:

Portstewart: general information and map

Original name
Portstewart
Continent
Reservoir
The local time
13:17
Timezone
UTC
Sunrise
06:08
Sunset
18:57
Length of the day
12 hours 48 minutes

Neighboring cities and resorts

CityWater*Distance**
Portrush47°C 4km
Castlerock48°C 5km
Portballintrae47°C 11km
Dunseverick47°C 19km
Moville47°C 21km
Ballycastle47°C 30km
Culdaff47°C 31km
Culmore47°C 38km
Londonderry48°C 43km
Cushendall47°C 43km
Waterfoot47°C 44km
Buncrana47°C 48km
* Water temperature in this place today
** Straight line distance in kilometers
Greenisland, United Kingdom
Greenisland, United Kingdom | © Barry Smith

The warmest water today in United Kingdom recorded in Mevagissey, its value is 51°F. Lowest - in Burntisland, there water temperature now 41°F. Average water temperature in the country today - 46°F.

Water temperature data in Portstewart and neighboring towns and resorts collected from various sources, using buoys, using satellite maps of sea, river and lake surfaces of the NOAA agency.

We use data from various local authorities in each specific location of the world to more accurately reflect temperature values.

The nearest airport is located in a 23 kilometers. This is Ballykelly (BOL) airport. We have no information as to whether it is valid and what flights it receives or sends.

Portstewart: weather forecast

The weather forecast is shown in local time in Portstewart

TODAY
15:00
39°F
42km/h
feels like 27°F, Rain (light rain)
humidity: 91%, clouds: 86%
18:00
42°F
22km/h
feels like 35°F, Rain (light rain)
humidity: 90%, clouds: 96%
21:00
39°F
8km/h
feels like 36°F, Rain (moderate rain)
humidity: 97%, clouds: 100%
MARCH 29
00:00
38°F
8km/h
feels like 34°F, Rain (moderate rain)
humidity: 97%, clouds: 100%
03:00
37°F
10km/h
feels like 32°F, Rain (light rain)
humidity: 93%, clouds: 100%
06:00
34°F
9km/h
feels like 29°F, Clouds (broken clouds: 51-84%)
humidity: 92%, clouds: 63%
09:00
40°F
7km/h
feels like 37°F, Clouds (scattered clouds: 25-50%)
humidity: 82%, clouds: 36%
12:00
47°F
7km/h
feels like 45°F, Clouds (broken clouds: 51-84%)
humidity: 70%, clouds: 62%
15:00
49°F
8km/h
feels like 47°F, Rain (light rain)
humidity: 70%, clouds: 32%
18:00
46°F
7km/h
feels like 44°F, Rain (light rain)
humidity: 83%, clouds: 38%
21:00
42°F
7km/h
feels like 39°F, Rain (light rain)
humidity: 90%, clouds: 75%
MARCH 30
00:00
40°F
13km/h
feels like 34°F, Clouds (broken clouds: 51-84%)
humidity: 91%, clouds: 51%
03:00
38°F
14km/h
feels like 32°F, Clouds (few clouds: 11-25%)
humidity: 92%, clouds: 11%
06:00
38°F
11km/h
feels like 32°F, Clouds (scattered clouds: 25-50%)
humidity: 92%, clouds: 28%
09:00
43°F
12km/h
feels like 39°F, Clouds (few clouds: 11-25%)
humidity: 85%, clouds: 16%
12:00
50°F
19km/h
feels like 47°F, Clouds (few clouds: 11-25%)
humidity: 64%, clouds: 20%
15:00
50°F
21km/h
feels like 48°F, Rain (light rain)
humidity: 70%, clouds: 67%
18:00
47°F
22km/h
feels like 41°F, Rain (light rain)
humidity: 82%, clouds: 81%
21:00
44°F
18km/h
feels like 38°F, Clouds (broken clouds: 51-84%)
humidity: 83%, clouds: 54%
MARCH 31
00:00
44°F
16km/h
feels like 39°F, Clouds (broken clouds: 51-84%)
humidity: 88%, clouds: 77%
04:00
46°F
16km/h
feels like 40°F, Rain (light rain)
humidity: 91%, clouds: 100%
07:00
44°F
15km/h
feels like 40°F, Rain (light rain)
humidity: 92%, clouds: 100%
10:00
46°F
24km/h
feels like 39°F, Rain (moderate rain)
humidity: 95%, clouds: 100%
13:00
47°F
22km/h
feels like 41°F, Rain (light rain)
humidity: 92%, clouds: 100%
16:00
46°F
23km/h
feels like 40°F, Rain (light rain)
humidity: 91%, clouds: 100%
19:00
47°F
11km/h
feels like 44°F, Rain (light rain)
humidity: 87%, clouds: 100%
22:00
47°F
10km/h
feels like 43°F, Clouds (overcast clouds: 85-100%)
humidity: 91%, clouds: 100%
APRIL 1
01:00
45°F
10km/h
feels like 41°F, Rain (light rain)
humidity: 94%, clouds: 100%
04:00
43°F
12km/h
feels like 38°F, Clouds (overcast clouds: 85-100%)
humidity: 94%, clouds: 100%
07:00
42°F
12km/h
feels like 37°F, Clouds (overcast clouds: 85-100%)
humidity: 93%, clouds: 99%
10:00
46°F
21km/h
feels like 41°F, Clouds (broken clouds: 51-84%)
humidity: 85%, clouds: 61%
13:00
49°F
20km/h
feels like 44°F, Clouds (broken clouds: 51-84%)
humidity: 74%, clouds: 51%
16:00
49°F
16km/h
feels like 45°F, Clouds (few clouds: 11-25%)
humidity: 68%, clouds: 17%
19:00
46°F
18km/h
feels like 41°F, Clouds (scattered clouds: 25-50%)
humidity: 80%, clouds: 38%
22:00
43°F
9km/h
feels like 40°F, Clouds (overcast clouds: 85-100%)
humidity: 88%, clouds: 100%
APRIL 2
01:00
42°F
10km/h
feels like 39°F, Clouds (overcast clouds: 85-100%)
humidity: 91%, clouds: 99%
04:00
43°F
9km/h
feels like 39°F, Clouds (overcast clouds: 85-100%)
humidity: 90%, clouds: 100%
07:00
42°F
9km/h
feels like 39°F, Rain (light rain)
humidity: 91%, clouds: 100%
Barton on Sea, United Kingdom
Barton on Sea, United Kingdom | © Simon Trow

Find out the temperature of sea water in more than 12000 cities and resorts around the world. Water surface temperature values are available in real time. There is a forecast of water temperature changes for the next few days, as well as historical data of sea surface temperature are available for all days of the last years.

We use data from various sources, including National Centers for Environmental Information (NOAA), meteorological services of different countries, data received from more than a thousand buoys around the world, satellite systems for scanning the surface of the oceans and seas.

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